google path mtu?
bruns at 2mbit.com
Mon Jan 19 17:42:47 CET 2015
On 1/19/15 5:52 AM, Artem Viklenko wrote:
> 19.01.2015 13:12, Mikael Abrahamsson написав(ла):
>> On Mon, 19 Jan 2015, Ignatios Souvatzis wrote:
>>> I had some problems at home, which is not tunneled, but a
>>> less-than-1500-octet-mtu PPPoE DSL line, so - thinking it's tunnels
>>> only ignores an increasing number of native private users.
>> Well, PPPoE is a tunnel, but I guess that's splitting hairs.
>> But regardless, I had trouble this morning with Youtube that might be
>> related to the same issue.
> One possible solution to force TCP MSS. For example on my FreeBSD
> router at home i used PF's scrub rule for ipv6 tunnel to set
> mss to 1220 bytes.
> If you use PPPoE as underlying technology, decrease this vale little
> bit more - 1212 or less.
Min MTU size allowable for ipv6 is 1280 according to RFC. Wouldn't
setting the MSS size to 1212 or 1220 essentially break that RFC as well
(1220+40 < 1280) or does the RFC only explicitly state the MTU has to be
at least 1280?
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